Actually, blonde hair and blue eyes are both recessive . So if they are both blonde with blue eyes then their children will all be blonde with blue eyes .
Therefore, OP, in the wise words of Maury, "You are NOT the father !"

Yeah, both my fiance and I have brown hair with blue eyes, and our daughter was born with red hair. I knew red hair was recessive from sophomore biology, but he skipped that class and for the longest time thought I cheated (and I can tell you for sure I didn't)
It took forever for him to kind of believe me, and didn't fully believe me until biology in college.
Also, both of us have strong Irish backgrounds, especially him who has red in his beard if he grows it out enough, so it's not that hard to imagine.

There are multiple genes that control hair color. Blonde hair is he recessive trait on one of the genes, and red hair is recessive on another. But the only way that the red hair will show up is if the blonde trait would be shown, as that is the only color that is light enough for the red hair.

My dad has blondish-brown hair, mom has blonde hair, I have dark brown (almost black) hair, and my sister has blonde, kind of reddish, hair. I'm also the only one with brown eyes in my entire family (on my mom's side). But I look exactly like my dad in terms of facial bone structure. It depends on the family tree. Your child could look like any of your relatives, not just you (or your wife, for that matter).